I solved the problem already. R141, R142 were open. You can,t see it, you have to
measure. I've learned it is the common problem in Denon receivers and Denon specialists are aware of that. You have to replace 1 Ohm, 0,5 W with 0,5 Ohm, ! W.
Now I have another problem. Receiver works if you connect linear output to tape
input and switch "tape monitor 'on'". I don't know why. I can't find a good user manual, just the two pages one. Any ideas?